55906440042631 has 16 divisors (see below), whose sum is σ = 56162336353920. Its totient is φ = 55650949643520.

The previous prime is 55906440042581. The next prime is 55906440042641. The reversal of 55906440042631 is 13624004460955.

It is a cyclic number.

It is not a de Polignac number, because 55906440042631 - 2¹⁷ = 55906439911559 is a prime.

It is a super-2 number, since 2×55906440042631² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55906440042641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2496146325 + ... + 2496168721.

It is an arithmetic number, because the mean of its divisors is an integer number (3510146022120).

Almost surely, 2^{55906440042631} is an apocalyptic number.

55906440042631 is a deficient number, since it is larger than the sum of its proper divisors (255896311289).

55906440042631 is a wasteful number, since it uses less digits than its factorization.

55906440042631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30954.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 55906440042631 in words is "fifty-five trillion, nine hundred six billion, four hundred forty million, forty-two thousand, six hundred thirty-one".